Evidence map›Paper›PMID 16497860›Full record

ArticleOccupational and environmental medicine2006

Tuberculosis and silica exposure in South African gold miners.

J M teWaternaude, R I Ehrlich, G J Churchyard, L Pemba, K Dekker, M Vermeis, N W White, M L Thompson, J E Myers

Open access · bronzeAbstract read
In one paragraph

Article in Occupational and environmental medicine, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed, 2 pooled it
2.8field-weighted citation impact, top 10% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

37 citing papers in PubMed, 2 syntheses or guidelines pooled it, 112 citations in OpenAlex.

  1. Guideline
  2. Pooled it
  3. Article
  4. Article
  5. Silicosis in Zambian ex-copper miners: A cross-sectional study.African journal of thoracic and critical care medicine · 2025
    Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Microbiology spectrum · 2022
    Article
  11. Article
  12. Article
  13. Article
  14. Mini-review: Silico-tuberculosis.Journal of clinical tuberculosis and other mycobacterial diseases · 2021
    Review
  15. Article
  16. Article
  17. Article
  18. Environmental Silica Dust Exposure and Pulmonary Tuberculosis in Johannesburg, South Africa.International journal of environmental research and public health · 2019
    Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 3 institutions in 1 country.

J M teWaternaudeSchool of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa. jim@cormack.uct.ac.za
R I Ehrlich
G J Churchyard
L Pemba
K Dekker
M Vermeis
N W White
M L Thompson
J E Myers
University of Cape Town · ZAAngloGold Ashanti (South Africa) · ZAAurum Institute · ZA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimsTo examine the effect of silica exposure, in the absence of silicosis, on the prevalence of pulmonary tuberculosis (PTB), which is epidemic among South African gold miners.

methodsCross-sectional study of 520 gold miners over 37 years of age. Length of service, and cumulative and average dust and quartz exposure indices were derived for each miner. Chest radiographs were read for PTB by two NIOSH "B" readers. PTB was defined as a self-reported history of PTB or PTB on chest radiograph. Logistic regression was used to adjust for age, smoking, and silicosis. PTB effects of different exposure metrics for silica, scaled on their interquartile range (IQR), were compared.

resultsMeans (ranges) were: age 46.7 (37.1-59.9) years; length of service 21.8 (6.3-34.5) years; average intensity of respirable quartz 0.053 (0-0.095) mg/m3. PTB prevalence was 19.4% (95% CI 16.0 to 22.8) on history alone, and 35.2% (95% CI 31.1 to 39.3) on history or on chest radiograph. Length of service was poorly predictive of PTB, while all exposure indices which included dust or quartz yielded prevalence odds ratios (PORs) of approximately 1.4 (95% CI approximately 1.1 to 1.8) for changes of one interquartile range in exposure. Controlling for silicosis--by adjustment or restriction--did not modify these results. Drillers and winch operators had the highest PTB prevalences and the highest dust and silica exposures.

conclusionOlder in-service gold miners in South Africa have a high prevalence of PTB, which is significantly associated with dust and silica exposure, even in the absence of silicosis. Limitations include a survivor workforce and the use of cumulative exposures based on current exposures. Dust control is an important component in control of the PTB epidemic in South African gold mines.

Indexed as

MiningAdultCross-Sectional StudiesDustGoldHumansMiddle AgedOccupational DiseasesOccupational ExposureOdds RatioPrevalenceRegression AnalysisSilicon DioxideSouth AfricaTuberculosis, PulmonaryDustGoldSilicon Dioxide

Identifiers

PMID16497860
PMCPMC2078150
OpenAlexW2052018441

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.